@article{(Open Science Index):https://publications.waset.org/pdf/1986, title = {A Simplified Adaptive Decision Feedback Equalization Technique for π/4-DQPSK Signals}, author = {V. Prapulla and A. Mitra and R. Bhattacharjee and S. Nandi}, country = {}, institution = {}, abstract = {We present a simplified equalization technique for a π/4 differential quadrature phase shift keying ( π/4 -DQPSK) modulated signal in a multipath fading environment. The proposed equalizer is realized as a fractionally spaced adaptive decision feedback equalizer (FS-ADFE), employing exponential step-size least mean square (LMS) algorithm as the adaptation technique. The main advantage of the scheme stems from the usage of exponential step-size LMS algorithm in the equalizer, which achieves similar convergence behavior as that of a recursive least squares (RLS) algorithm with significantly reduced computational complexity. To investigate the finite-precision performance of the proposed equalizer along with the π/4 -DQPSK modem, the entire system is evaluated on a 16-bit fixed point digital signal processor (DSP) environment. The proposed scheme is found to be attractive even for those cases where equalization is to be performed within a restricted number of training samples.}, journal = {International Journal of Electronics and Communication Engineering}, volume = {2}, number = {12}, year = {2008}, pages = {2726 - 2733}, ee = {https://publications.waset.org/pdf/1986}, url = {https://publications.waset.org/vol/24}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 24, 2008}, }